Hi there —

I'm trying to detect pitches from a Bell Kit instrument for a music education app; and so far I'm having trouble picking up MIDI pitches above the 90s/100s; which is the target range for this instrument.

Here's a test patch I'm using to determine whether [sigmund~] or [helmholtz~] does a better job at reporting higher pitched content. It seems that sigmund~ is generally better at detecting the higher pitches but it seems to stop picking things up above the MIDI pitch 100 range; which is the range of the second recording in the zip file. Can anyone tell me if there is a limit for these objects for higher frequency detection, or suggest parameter configurations or different methods for tracking this instrument?

It was brought to my attention that the zipfile in my last post was being flagged by different browsers as a virus — here are the files contained in that zip:

bellkit_test.pd
bellkit_test.wav
bellkit_test2.wav

I did not look at your patch but as far as I can remember, I had success extending the lower tracking range by up or downsampling the fiddle~ sigmund~ or helmholz~ object. This might work for the upper range, too. Keep filtering aliasing in mind, while up /down sampling.
The instrument's bell-like tones might confuse the tracking. Low pass filtering harmonic content might help.

@chmod Can't get to your files.
[helmholz~] tops out at 2000Hz I think.
Assuming your bells are fairly sinusoidal and the fundamental has more power than the harmonics this should work (I think) followed by an [ftom].
David.